Synthesis of Enaminones in Aqueous Media Using Catalytic Dilute HCl
摘要:
[image omitted] A green and convenient approach to the synthesis of -enaminones from aromatic amines and 5-substituted-1,3-cyclohexanedione in the presence of dilute hydrochloric acid (30mmol/L) as a catalyst in solvent-free media is described. This method provides several advantages such as environmental friendliness, low cost, good yields, and simple workup procedure.
FeCl3 catalysed multicomponent divergent synthesis of a library of indeno-fused heterocycles
作者:Sunil Rana、Mike Brown、Chhanda Mukhopadhyay
DOI:10.1039/c2ra23332k
日期:——
A simple, straightforward and versatile multicomponent synthetic protocol for indeno-fused heterocycles, namely diindeno[1,2-b:2′,1′-e]pyridine, indeno[1,2-b]quinoline and indeno[1,2-b]cyclopenta[e]pyridine derivatives, has been developed. The strategy involves the one pot three component reaction of enaminone, dialkyl but-2-ynedioate and 1,3-indanedione catalysed by FeCl3 in acetonitrile under reflux
Multicomponent, one-pot and expeditious synthesis of highly substituted new spiro[indolo-3,10′-indeno[1,2-b]quinolin]-2,4,11′-triones under micellar catalytic effect of CTAB in water
作者:Animesh Mondal、Mike Brown、Chhanda Mukhopadhyay
DOI:10.1039/c4ra04918g
日期:——
A convenient multicomponent reaction strategy for the synthesis of highly substitutednew spiro[indolo-3,10′-indeno[1,2-b]quinolin]-2,4,11′-triones has been developed under CTAB/H2O system (easily recovered and recycled) to provide spiro products with excellent yields. The most exciting feature of this methodology is its mechanism involving the unusual ring opening of an isatin moiety followed by recyclisation
在CTAB / H 2 O体系下,开发了一种方便的多组分反应策略,用于合成高度取代的新螺[indolo-3,10'-茚并[1,2- b ]喹啉] -2,4,11'-三酮。(易于回收和再循环),以提供高产量的螺环产品。该方法学最令人兴奋的特征是其机制涉及伊斯兰素部分的异常开环,然后进行环化。
Brønsted acid-catalyzed regioselective reactions of 2-indolylmethanols with cyclic enaminone and anhydride leading to C3-functionalized indole derivatives
作者:Can Li、Hong-Hao Zhang、Tao Fan、Yang Shen、Qiong Wu、Feng Shi
DOI:10.1039/c6ob01282e
日期:——
substitution of 2-indolylmethanols with nucleophiles such as cyclic enaminone and cyclic anhydride has been established in the presence of Brønsted acid, which efficiently afforded C3-functionalized indole derivatives with structural diversity in high yield and regiospecificity (40 examples, up to 99% yield). Using this approach, the reactivity of the C3-position of the indole was switched from nucleophilic to
Domino Constructions of Pentacyclic Indeno[2,1-c]quinolines and Pyrano[4,3-b]oxepines by [4+1]/[3+2+1]/[5+1] and [4+3] Multiple Cyclizations
作者:Bo Jiang、Bao-Ming Feng、Shu-Liang Wang、Shu-Jiang Tu、Guigen Li
DOI:10.1002/chem.201201109
日期:2012.8.6
New three‐component domino reactions have been discovered. The reactions are easy to perform (see scheme; MW=microwave irradiation) and proceed with fast rates, which makes work‐up convenient. Most of the multiple stereocenters and the geometry are controlled well. The stereochemistry has been unequivocally determined by X‐ray structural analysis.
发现了新的三组分多米诺骨牌反应。该反应易于进行(参见方案;MW=微波辐射)并且进行速度快,这使得后处理变得方便。大多数多个立构中心和几何形状都控制得很好。立体化学已通过 X 射线结构分析明确确定。
Tandem Copper(I)‐Catalyzed
<i>N</i>
‐Arylation–1,4‐Conjugate Addition to Access Tetrahydroacridinones
作者:Jyoti M. Honnanayakanavar、Purna Chandra Behera、Surisetti Suresh
DOI:10.1002/adsc.202200877
日期:2022.12.8
copper-catalyzed tandem process integrating N-arylation and 1,4-conjugate addition is disclosed through the reaction of cyclic enaminones and ortho-halochalcones. The reaction appears to proceed through chemoselective arylation on the nitrogen of enaminone with ortho-halochalcones and Michael addition of α-carbon of the enaminone to the chalcone to furnish a diverse range of tricyclic tetrahydroacridinone derivatives